package org.itstack.demo.design;

/**
 * @Author: fanYuLe
 * @CreateTime: 2023-12-15  15:25
 * @Description: 使用类的内部类（线程安全）
 */
public class Singleton_04 {

    private static class SingletonHolder{
        private static  Singleton_04 instance = new Singleton_04();
    }

    private Singleton_04(){}

    public static Singleton_04 getInstance(){
        return SingletonHolder.instance;
    }
}
